No need to be defensive Terri, trying to help either you or the next person to stumble across this thread down the road. But frequent cleanings from cleaner shrimp is not normal behavior for a fish, and many experienced aquarists use cleaner shrimp as a sign for when the fish are ill. If a fish is frequently asking a cleaner to hop on that is an easy and well know sign of parasites or illness. Most frequently a sign of flukes or other external parasite, but less frequently a sign of infection or internal parasites.
I mean how can you say that with such certainty when you posted this a week ago?
My tank is 2 months old. I added 2 juvenile Percula Clownfish at the very beginning and they have been great. 3 weeks later I added a Royal Gramma and they all were great. 2 weeks later I added an Orchid Dottyback. Again, all great. 1 week ago I added 5 new snails. None of them were...
www.reef2reef.com
You have very little information on the cause of death of these fish, and the conclusion that it was a thermoplastic interacting with a cyanoacrylate is dubious at best. Would need some solid support not your "LFS experts" said so so I believe them. I just talked to a chemist and material scientist, they both thought such an explanation was ludicrous. Far more likely that a disease reared up without obvious symptoms.
Yet you haven't said what prophylactic treatments or QT protocol you use. Some people call 1 week in a different tank a QT.
From the linked thread on the dead clownfish
So you didn't actually QT any of your fish? I have had fish from some of the best "Pre-QT'd" fish suppliers in the nation and their protocols are not failproof. I highly doubt un-named supplier with undescribed QT protocol is up to snuff.
If one is going to trust anyones QT process, they should be able to answer the following questions:
Specifically what was the QT process? What biosecurity measures were taken to prevent the introduction of new illness? What prophylactic treatments were undertaken?
The "Seagan Standard": Extraordinary claims require extraordinary evidence
Combining 2 stable commonly used materials killed my fish
My anthias is friends with a shrimp
Extraordinarily optimistic claims compared to far more conventional explanations for the observations.
I get it, it is far more desirable to come up with anything other than unknown illness as what's going on. I have killed a few fish convincing myself that a red flag wasn't a bad sign.